First off I'll say that I loved the Mighty Mouse. I deactivated the second button and used it strictly for the scroll wheel, scroll button and side buttons. It really is what I have been looking for, but while still using the one-button style I've been used to. A few days after I purchased the Mighty Mouse, the scroll wheel stopped scrolling up. I posted a comment in the "Mighty Mess" thread, received a few suggestions that didn't work, so I just took it back and got a new one. Now after 3 days of use, it won't scroll down. I can't be the only person experiencing this -- I mean, two faulty mice in a week's time? Fishes, narco.